题目内容
Not until all the fish died in the lake __________ how serious the pollution was.
| A．did the villagers realize | B．the villagers realized |
| C．realized the villagers | D．do the villagers realize |
A
解析试题分析：句意：直到湖里所有的鱼都死了，村民才意识到污染多严重。Not until+从句放在句首的时候，后面的主句要部分倒装，助动词放在主语前面，排除BC，因为前面用died，所以用一般过去式，选A。
考点：考查倒装句
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